Euhemerism is an approach to the interpretation of mythology in which mythological accounts are presumed to have originated from real historical events or personages. Euhemerism supposes that historical accounts become myths as they are exaggerated in the retelling, accumulating elaborations and alterations that reflect cultural mores. It was named for the Greek mythographer Euhemerus, who lived in the late 4th century BC. In the more recent literature of myth, such as Bulfinch's Mythology, euhemerism is termed the "historical theory" of mythology.

Myth is a genre of folklore or theology consisting primarily of narratives that play a fundamental role in a society, such as foundational tales or origin myths. For scholars, this is very different from the vernacular usage of the term "myth" that simply refers to something that is not true. Instead, the truth value of a myth is not a defining criterion.